Nuclear Deformation at Finite Temperature

作者：Alhassid Y^*; Gilbreth C N; Bertsch G F

来源：Physical Review Letters, 2014, 113(26): 262503.

DOI：10.1103/PhysRevLett.113.262503

Deformation, a key concept in our understanding of heavy nuclei, is based on a mean-field description that breaks the rotational invariance of the nuclear many-body Hamiltonian. We present a method to analyze nuclear deformations at finite temperature in a framework that preserves rotational invariance. The auxiliary-field Monte Carlo method is used to generate a statistical ensemble and calculate the probability distribution associated with the quadrupole operator. Applying the technique to nuclei in the rare-earth region, we identify model-independent signatures of deformation and find that deformation effects persist to temperatures higher than the spherical-to-deformed shape phase-transition temperature of mean-field theory.

• 出版日期2014-12-30